Changes between Version 89 and Version 90 of Old/Tutorials/k0SDR/Tutorial00


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Timestamp:
Jan 14, 2010, 5:26:17 PM (14 years ago)
Author:
seskar
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  • Old/Tutorials/k0SDR/Tutorial00

    v89 v90  
    22[[TOC]]
    33
    4 This document is not meant to be a complete tutorial on GNU Radio, but to help you start to play around GNU Radio on Orbit Sandbox and to share my experiences on exploring this wonderful toy.
     4This document is not meant to be a complete tutorial on GNU Radio, but a starting point on using GNU Radio on Orbit Sandbox.
    55
    66== Prerequisites ==
     
    1515Sandbox5 consists of two nodes, i.e. node1-1 and node1-2. Each individual node is connected to one Gnuradio motherboard, and each motherboard in turn has two BasicRX and two BasicTX mounted on it, as show in the following picture.
    1616
    17 [[Image(Documentation/GNURadio:sandbox5.JPG)]]
     17[[Image(sandbox5.JPG)]]
    1818
    1919The frequency that the BasicTX operates on ranges from 2 MHz to 200 MHz, and the BasicRX can receive from 2 MHz to 300+ MHz.
     
    7070    Using the matlab script [http://www.orbit-lab.org/attachment/wiki/Documentation/GNURadio/plotall.m plotall('noise.dat')], you will see the following output:
    7171
    72 [[Image(Documentation/GNURadio:noise.dat.jpeg)]]
     72[[Image(noise.dat.jpeg)]]
    7373
    7474
     
    9696    Using the matlab script [http://www.orbit-lab.org/attachment/wiki/Documentation/GNURadio/plotall.m plotall('rx_1m.dat')], you can get the following figure:
    9797
    98 [[Image(Documentation/GNURadio:rx_1m.dat.jpeg)]]
     98[[Image(rx_1m.dat.jpeg)]]
    9999
    100100What we observe in the above plot is not a perfect sine wave. There are some high frequency components around the 10KHz sine wave. This is because that we set the target frequency as 1MHz, which is out of the working range of BasicRX and BasicTX. Recall that the working range of BasicRX and BasicTX is from 2MHz to 200MHz+. Now let’s try to set the correct frequency.
     
    112112
    113113    The resulting plot is :
    114 [[Image(Documentation/GNURadio:rx_10m.dat.jpeg)]]
     114[[Image(rx_10m.dat.jpeg)]]
    115115
    116116This time the received sine wave is indeed a regular sine wave.
     
    138138They can be found in '''gnuradio/gnuradio-examples/python/usrp''' directory.
    139139
    140 [[Image(Documentation/GNURadio:double_sine.2.PNG)]]
     140[[Image(double_sine.2.PNG)]]
    141141
    142142Potential applications: